| GdFeAsO_(1-x)F_x超导体的制备及其超导电性 |
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| 引用本文： | 崔雅静,陈永亮,杨烨,王雅真,张勇,赵勇.GdFeAsO_(1-x)F_x超导体的制备及其超导电性[J].低温物理学报,2010(1). |
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| 作者姓名： | 崔雅静 陈永亮 杨烨 王雅真 张勇 赵勇 |
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| 作者单位： | 磁浮技术与磁浮列车教育部重点实验室;西南交通大学超导研究开发中心; |
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| 基金项目： | 国家杰出青年基金(批准号:50588201);;国家基础研究项目(973)(批准号:2007CB616906);;国家教育部长江学者和创新团队发展计划(批准号:IRT0751);;西南交通大学青年教师科研起步项目(批准号:2009Q009)资助的课题~~ |
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| 摘 要： | 通过先制备一种纳米尺寸的GdF3作为GdFeAsO1-xFx样品中F的反应原料,在相对较低的温度(1120℃)下成功制备出一系列GdFeAsO1-xFx(x=0,0.05,0.1,0.15,0.2,0.25)多晶样品.X射线衍射结果表明,超导样品属四方ZrCuSiAs-type结构,晶格参数随着掺F量的增加而减小.扫描电子显微镜测试结果表明,样品具有片层状晶体形貌特征.当掺F量x=0.1时,样品表现出超导电性,超导转变温度为22K,随着掺F量的增多,超导转变温度升高.和其他制备方法相比,这种制备方法更有利于F的掺入,而且可有效减少样品中杂质相的含量.
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| 关 键 词： | 铁基超导体 ZrCuSiAs结构 |
PREPARATION AND SUPERCONDUCTIVITY OF GdFeAsO_(1-x)F_x |
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| CUI Ya-jing CHEN Yong-liang YANG Ye WANG Ya-zhen ZHANG Yong ZHAO Yong Key Laboratory of Magnetic Levitation Technologies , Maglev Trains,Ministry of Education of China, Superconductivity R&D Center ,Mail Stop #,Southwest Jiaotong University,Chengdu.PREPARATION AND SUPERCONDUCTIVITY OF GdFeAsO_(1-x)F_x[J].Chinese Journal of Low Temperature Physics,2010(1). |
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| Authors: | CUI Ya-jing CHEN Yong-liang YANG Ye WANG Ya-zhen ZHANG Yong ZHAO Yong Key Laboratory of Magnetic Levitation Technologies Maglev Trains Ministry of Education of China Superconductivity R&D Center Mail Stop # Southwest Jiaotong University Chengdu |
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| Abstract: | Preparation of F-doped GdFeAsO1-xFx samples has been developed using GdF3 with nanometer scale as the source of fluorine. Polycrystalline samples of GdFeAsO1-xFx (x = 0,0.05,0.1,0.15,0.2,0.25) have been successfully synthesized using the present method. According to the X-ray diffraction patterns,all of the samples possess a tetragonal ZrCuSiAs-type structure and the lattice parameters decreased with the increasing doping level. The layered crystal structure has been observed in the scanning electronic Micr... |
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| Keywords: | iron-based superconductor ZrCuSiAs-type structure |
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